Sandvik Coromant 7231370 Turning Insert DCMT32.52-MR 2220

Product Description

The SANDVIK COROMANT 7231370 is a solid carbide turning insert designed for precision external and internal turning operations on CNC lathes and turning centers. Manufactured under the CoroTurn 107 series, this insert features a DCMT geometry with a 55-degree diamond shape, providing a sharp, stable cutting edge suited to finishing and semi-finishing passes. The insert carries a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which delivers thermal resistance and wear protection during continuous cutting cycles. With a 3/8-inch inscribed circle and a 1/32-inch corner radius, it is sized for light-to-medium depth-of-cut applications where surface finish and dimensional accuracy are critical.

This insert is intended primarily for machining stainless steel and other ISO M-group workpiece materials, making it a common choice in job shops, production turning cells, and maintenance machining environments. The neutral hand orientation allows mounting in standard DCMT-compatible toolholders. Licensed machinists and CNC operators working to tight tolerances on stainless components will find the MR chip breaker geometry effective at controlling chip formation during finishing cuts.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for thermal and wear resistance
• 55-degree diamond insert shape (DCMT) with neutral hand orientation
• 1/32-inch corner radius for controlled surface finish on finishing passes
• MR chip breaker geometry optimized for stainless steel and ISO M-group materials
• Screw-lock insert holding method for positive, repeatable seating in compatible toolholders
• Two cutting edges per insert for extended tooling value

Compatibility

Designed as an OEM-style replacement turning insert for use in DCMT-compatible toolholders within the SANDVIK COROMANT CoroTurn 107 series. ISO code DCMT 11 T3 08-MR 2220 identifies the insert geometry and grade for cross-reference with compatible holder specifications.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before changing inserts. Seat the insert fully against the toolholder pocket and torque the clamping screw according to the toolholder manufacturer specifications. Inspect the insert seat and clamping components for wear or debris before each insert change to ensure accurate, repeatable positioning.